Yusof, A. L., B. Abu Bakar, N. Ya’acob, and M. A. Zainali. “Mobile Relay Handover Procedure in Train for 4G LTE-Advanced Network”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 9, no. 2-2, June 2017, pp. 49-53, https://jtec.utem.edu.my/jtec/article/view/2218.